Mare Insularum
E520202
Mare Insularum is a lunar mare, or basaltic plain, on the Moon’s near side, formed by ancient volcanic activity and located near prominent craters such as Copernicus.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Mare Insularum canonical | 6 |
| Mare Insularum region | 2 |
| Mare Insularum region of the Moon | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5412515 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Mare Insularum Context triple: [Copernicus (lunar crater), nearbyFeature, Mare Insularum]
-
A.
Mare Tranquillitatis
Mare Tranquillitatis is a lunar mare on the Moon’s near side, best known as the site of Apollo 11’s first crewed Moon landing.
-
B.
Mare Imbrium
Mare Imbrium is a vast, dark lunar mare formed by ancient volcanic activity, prominent on the Moon’s near side and notable as the landing site of several Apollo missions.
-
C.
Mare Internum
Mare Internum is the ancient Roman name for the Mediterranean Sea, the central body of water around which much of classical civilization developed.
-
D.
Mare Cognitum region, Oceanus Procellarum
The Mare Cognitum region in Oceanus Procellarum is a basaltic lunar mare on the Moon’s near side, notable as the site of NASA’s Apollo 12 crewed landing.
-
E.
Descartes Highlands
Descartes Highlands is a rugged, heavily cratered lunar highland region notable as the exploration site of NASA’s Apollo 16 mission.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Mare Insularum Target entity description: Mare Insularum is a lunar mare, or basaltic plain, on the Moon’s near side, formed by ancient volcanic activity and located near prominent craters such as Copernicus.
-
A.
Mare Tranquillitatis
Mare Tranquillitatis is a lunar mare on the Moon’s near side, best known as the site of Apollo 11’s first crewed Moon landing.
-
B.
Mare Imbrium
Mare Imbrium is a vast, dark lunar mare formed by ancient volcanic activity, prominent on the Moon’s near side and notable as the landing site of several Apollo missions.
-
C.
Mare Internum
Mare Internum is the ancient Roman name for the Mediterranean Sea, the central body of water around which much of classical civilization developed.
-
D.
Mare Cognitum region, Oceanus Procellarum
The Mare Cognitum region in Oceanus Procellarum is a basaltic lunar mare on the Moon’s near side, notable as the site of NASA’s Apollo 12 crewed landing.
-
E.
Descartes Highlands
Descartes Highlands is a rugged, heavily cratered lunar highland region notable as the exploration site of NASA’s Apollo 16 mission.
- F. None of above. chosen
Statements (31)
| Predicate | Object |
|---|---|
| instanceOf |
basaltic plain
ⓘ
lunar mare ⓘ |
| adjacentTo |
Copernicus crater
ⓘ
Kepler crater ⓘ Mare Imbrium ⓘ Oceanus Procellarum ⓘ |
| belongsTo | near side western hemisphere of the Moon ⓘ |
| boundedBy | highland terrain ⓘ |
| classification | mare basalt province ⓘ |
| coordinateSystem | selenographic coordinates ⓘ |
| formedBy | ancient volcanic activity ⓘ |
| formedIn | Imbrian period ⓘ |
| geologicalContext | impact-basin-related mare fill ⓘ |
| hasAge | approximately 3 to 3.5 billion years ⓘ |
| hasAlbedo | low albedo ⓘ |
| hasEjectaOverlay |
Copernicus crater ejecta
ⓘ
Kepler crater ejecta ⓘ |
| hasFeature |
lava flow fronts
ⓘ
small impact craters ⓘ wrinkle ridges ⓘ |
| imagedBy | Lunar Reconnaissance Orbiter ⓘ |
| isDarkerThan | lunar highlands ⓘ |
| locatedOn |
Moon
ⓘ
near side of the Moon ⓘ |
| nameLanguage | Latin ⓘ |
| nameMeaning | Sea of Islands ⓘ |
| observedBy |
Apollo missions
ⓘ
linked to:
Apollo program
Lunar Orbiter missions ⓘ |
| partOf | lunar nearside maria ⓘ |
| surfaceComposition | basalt ⓘ |
| surfaceType | solidified lava plain ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Mare Insularum Description of subject: Mare Insularum is a lunar mare, or basaltic plain, on the Moon’s near side, formed by ancient volcanic activity and located near prominent craters such as Copernicus.
Referenced by (9)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject linked to:
Copernicus Crater on the Moon
subject linked to:
Mare Cognitum region, Oceanus Procellarum
linked to: Mare Insularum
linked to: Mare Insularum
linked to: Mare Insularum